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THE GOVERNMENT OP THE PHILIPPINE ISLANDS 
DEPARTMENT OP PUBLIC INSTRUCTION 
BUREAU OP AGRICULTURE 
Answered 
• •*»*«*« «** 
Manila, December 10, 1914. 
Sir* * * * 
I have the honor to acknowledge receipt of samples of your insecti¬ 
cides and germicides 
As previously stated, cur office is desirous of obtaining a compound 
that may be utilized as a contact insecticide against locust in the nymph 
(hopper) stage. To this end, I have tried out in a small way the samples of 
Coro-Noleum. While the magnitude of xhis experiment makes it impossible to 
state definitely its value under actual field conditions, such as obtain in 
the uninhabited lands, yet I believe that, from what I have seen, we can uti¬ 
lize It successfully in destroying this pest. As you are aware, the test 
made was conducted upon the fifth instar hoppers almost, ready to take wing, 
which are, of course, more resistant than the younger ones to an insecticide. 
In view of the results obtained in this trial, I have placed a requisition for 
- m mm mm . |_ i . ■ i .1 — ■ ■ wmm 1 11 ■■ . ■ 1 , -r~ n — — r-- 1 ~~~ r~ « mmmi+m****t* 
* 
one hundred gallons of Coro-Noleum, which amount should furnish enough material 
to determine the exact value of the same as locusticide. Should opportunity 
offer, I will also test it cut on such other pests as are brought to the at¬ 
tention cf this office. Upon completion of our experiments, should the same 
be desired by ycu, I will be pleased to furnish you with a copy of the re¬ 
sults obtained. 
Very respectfully, . 
(SD.) D. B. Mackie 
Entomologist. 
Mr. Julius Norden, 
The West Disinfecting Co., 
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